I saw that one of my accounts were compromised causing high server loads. I find some files such as in a new directory "log" with the file "error.php".

I tried deleting it but it keeps reappearing. Meaning I run the rm -rf error.php command under root, then it appears the file to be removed but then I run ls -l and the file is back. I tried "chown", "chmod", chattr -i, etc. nothing seems to work.